I read somewhere recently that the 8 hours a night number is wrong, and it depends on your age, lifestyle, and genetics. 6 was at the lower end of what they sai

I read somewhere recently that the 8 hours a night number is wrong, and it depends on your age, lifestyle, and genetics. 6 was at the lower end of what they said was fine, though unfortunately I don't remember the source or if it was reputable.